some jsdoc fixes; bit of cleanup

Merge pull request #2038 from mjhasbach/DisplayObject.setParent ...

Added DisplayObject.setParent

DisplayObject.setParent: Return the Container instead of the DisplayObject

Merge pull request #2040 from stbaer/circle-segs ...

Changed totalSegs in GraphicsRenderer buildCircle …

Update .travis.yml

Update .travis.yml

fixes wrong jsdoc param name

Changed totalSegs in GraphicsRenderer buildCircle from 40 to a dynamic value that depends on the radius of the circle, see issue #1928

Merge pull request #2036 from berthise/dev ...

Add tint to tiling sprites in canvas renderer

Add DisplayObject.setParent tests

Add DisplayObject.setParent

Add tint to tiling sprites in canvas renderer

Fix issue #1943 ...

Fix issue where cannot revert tint in Canvas Renderer https://github.com/pixijs/pixi.js/issues/1943

Fix issue #1943 ...

Fix issue where cannot revert tint on CanvasRenderer https://github.com/pixijs/pixi.js/issues/1943

Merge pull request #2033 from autumn8/dev ...

Fix for issue #2031

Merge branch 'dev' of https://github.com/autumn8/pixi.js into dev

Fixes https://github.com/pixijs/pixi.js/issues/2031. Adds imageUrl to baseTexture in textureParser. Adds texture to basetexturecache

Bugfix for arc, always use startX and startY as first point.

Merge pull request #2028 from sweetmandm/dev ...

Fix TilingSprite offset issue with CanvasRenderer

Fix TilingSprite offset issue with CanvasRenderer ...

There is a bug in the CanvasRenderer of TilingSprite when
tilePosition + tileScale are both set.

The WebGL version of this fix was in 6d5bedd, however at the
time I didn't realize that it didn't actually fix the
CanvasRenderer version. This resolves the issue, as
demonstrated here:

http://www.davidsweetman.com/pixi/canvas-tiling-sprite-fix/

Fix bug #1999 ...

Fixed bug #1999 - RenderTexture.render() does not handle Martix when using CanvasRenderer

Revert "update mask transforms; fixes #1978" ...

This reverts commit c8244ed.

update mask transforms; fixes #1978

properly set dirty for cloned graphics; fix #2003

Merge pull request #1912 from sebastian-rightshift/dev ...

class: BitmapText

Merge pull request #2012 from zOadT/dev ...

Buff MovieClip: Added support for timed frames

Remove `_lag` property ...

MovieClip._lag just caused confusion. Lag gets now calculated from
currentTime in MovieClip.prototype.update

Merge pull request #2020 from RoryDouglas7/canvas_mask_fix ...

Rebased fixes for canvas masking/renderMode

Rebased fixes for canvas masking/renderMode

Merge pull request #2015 from stbaer/dev-pr ...

updated earcut and some dev dependency versions